Bitcoin Price Falls: Why?

Bitcoin Price fell bellow $3,500 cause Chinese bitcoin exchange BTCChina says that it will stop all trading of Bitcoin from September 30. 

 BTCChina was the world's second largest bitcoin exchange.

some Reff: https://www.cnbc.com/2017/09/14/bitcoin-is-dropping-right-now-after-a-big-chinese-exchange-said-it-is-closing.html

http://www.express.co.uk/finance/city/854161/Bitcoin-price-why-falling-dropping-cryptocurrency-falls-BTCChina-exchange-news